New PDF release: Pomeron Physics and QCD (Cambridge Monographs on Particle

By Sandy Donnachie, Günter Dosch, Peter Landshoff, Otto Nachtmann

ISBN-10: 0511066813

ISBN-13: 9780511066818

ISBN-10: 052178039X

ISBN-13: 9780521780391

This quantity provides an account of recent wisdom of Regge concept and QCD, an energetic region of high-energy particle-physics examine. It documents what has been realized long ago, what's appropriate now, and what's crucial for the long run. The authors disguise 40 years of analysis and supply exact perception into the idea and its phenomenological improvement. The phenomenology is utilized to quite a few reactions and is in comparison broadly with test. this can be crucial analyzing for particle physicists and is acceptable as a graduate textbook.

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Extra resources for Pomeron Physics and QCD (Cambridge Monographs on Particle Physics, Nuclear Physics and Cosmology)

Sample text

Particle and resonance exchange in the crossed channel thus appear as an important part of high-energy scattering. However, it is straightforward to show that the scattering amplitude cannot be dominated by the exchange of just a few t-channel resonances. 3. 2) l=0 where zt = cos θt = 1 + in the equal-mass case. Although this series is a correct representation of scattering in the physical region of the t-channel, where t > 4m2 , s < 0 and |zt | ≤ 1, it is not readily applicable in this form to t-channel exchange for high-energy s-channel scattering.

32) This is an example of the factorisation property of Regge-pole residues. We note that it is mathematically possible[30], though there is no experimental evidence for it, that the t-channel bound states and resonances manifest themselves not as simple poles (t − tB )−1 or (t − tR )−1 , but as higher-order poles (t − tB )−n or (t − tR )−n . Likewise, there may be higherorder poles in the l-plane, (1 − α(t))−n . 11. 15). 33) (log s), (log s)2 , . . , (log s)n−1 . 2 that if a branch point, with its attached cut, is encountered during the deformation of the contour in the complex l-plane then it also contributes to the asymptotic behaviour.

Each pair contains an isospin zero and an isospin one trajectory, so effectively the “leading trajectory” contains four near-degenerate trajectories. 10. 9. The slope is comparable to that for the meson trajectories. We shall not consider the Regge phenomenology of baryon trajectories. An excellent review of this topic can be found in [29]. It is familiar that the residue G(t0 ) of a particle pole in a partial-wave amplitude Aσ (t) factorises. That is, when it occurs in an s-channel scattering amplitude a + b → c + d, Ga+b→c+d (t0 ) = g ab g cd .

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Pomeron Physics and QCD (Cambridge Monographs on Particle Physics, Nuclear Physics and Cosmology) by Sandy Donnachie, Günter Dosch, Peter Landshoff, Otto Nachtmann


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